package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
			System.out.println("Please specify parameters: <amount of test data> <file> <format>");
			return;
		}
		
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if (file.exists()) {
			System.out.println("File " + file + " already exists. Remove it manually");
			return;
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)) {
			saveContactsToCsvfile(contacts, file);
		} else if ("xml".equals(format)) {
			saveContactsToXmlfile(contacts, file);
		} else {
			System.out.println("Unknown format " + format);
			return;
		}
	}

	private static void saveContactsToCsvfile(List<ContactData> contacts, File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstName() + "," + contact.getLastName()
												+ "," + contact.getAddress()
												+ "," + contact.getHomePhone()
												+ "," + contact.getMobile()
												+ "," + contact.getWorkPhone()
												+ "," + contact.getEmail()
												+ "," + contact.getEmail2()
												+ "," + contact.getBday()
												+ "," + contact.getBmonth()
												+ "," + contact.getByear()
												+ "," + contact.getAddress2()
												+ "," + contact.getPhone2()
												+ ",!" + "\n");
		}
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
				.withFirstName(part[0])
				.withLastName(part[1])
				.withAddress(part[2])
				.withHomePhone(part[3])
				.withMobile(part[4])
				.withWorkPhone(part[5])
				.withEmail(part[6])
				.withEmail2(part[7])
				.withBday(part[8])
				.withBmonth(part[9])
				.withByear(part[10])
				//contact.group       = "new name";
				.withAddress2(part[11])
				.withPhone2(part[12]);
						
			list.add(contact);
			line = bufferedReader.readLine();
		}
		bufferedReader.close();
		return list;
	}

	private static void saveContactsToXmlfile(List<ContactData> contacts, File file) throws IOException{
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);		
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();
		for (int i=0; i<amount; i++) {
			ContactData contact = new ContactData()
			.withFirstName(generateRandomString())
	    	.withLastName(generateRandomString())
        	.withAddress(generateRandomString())
        	.withHomePhone(generateRandomString())
        	.withMobile(generateRandomString())
        	.withWorkPhone(generateRandomString())
        	.withEmail(generateRandomString())
        	.withEmail2(generateRandomString())
        	.withBday(generateRandomDay())
        	.withBmonth("July")
        	.withByear("1980")
        	//contact.group       = "new name";
        	.withAddress2(generateRandomString())
        	.withPhone2(generateRandomString());
		                	
            list.add(contact);
		}	
		return list;		
	}
	
	public static String generateRandomString() {
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0) {
	    	return "";
	    } else {
	    	return "test" + rnd.nextInt();
	    }
	}
	
	public static String generateRandomDay() {
		Random rnd = new Random();
		int rndDay = rnd.nextInt(31);
		if (rndDay == 0) {
			return "1";
	    } else {
	    	return ""+rndDay+"";	    	
	    }
	}
}
